Table 4

SAH in-hospital mortality rate 1 year previously compared with 1 year during the COVID-19 pandemic

NOverall volume
aSAH admissionsMortalityMortality rate (%)P value
Overall
 Before COVID1445918112919.080.12
 During COVID5654118120.89
Hospital aSAH volume: low
 Before COVID463259428.920.936
 During COVID37710828.65
Hospital aSAH volume: medium
 Before COVID51140231022.110.678
 During COVID140730221.46
Hospital aSAH volume: high
 Before COVID47419172517.300.003
 During COVID387077119.90
Centre COVID-19 volume: low
 Before COVID47177229316.530.872
 During COVID181229616.34
Centre COVID-19 volume: intermediate
 Before COVID42142129620.830.116
 During COVID133431123.31
Centre COVID-19 volume: high
 Before COVID41203544521.870.003
 During COVID190749525.96
  • The periods before and during COVID-19 pandemic were defined as 12 months before and during the COVID-19 pandemic, respectively.

  • aSAH, aneurysmal subarachnoid haemorrhage; n, number of hospitals; SAH, subarachnoid haemorrhage.